HBL Power Systems Ltd manufactures Sealed Cylindrical Ni-Cd Battery Packs for Defence Communications. HBL Power Systems Ltd is an ISO 9001:14001 certified company. The Sealed Cylindrical Ni-Cd Battery Packs for Defence Communications are designed incorporating the latest technology ensuring high standards. They are available in packs using a wide range of cells from 110mAh to 8000mAh for various applications.